What is NHO3 plus KOH equal?

'NHO3' is normally written as 'HNO3' and is named Nitric Acid.

NB For all mineral acids, the acidic 'H' is the first (left) letter in the formukla. (HNO3)

For carboxylic acids , the Acidic 'H' is the last(right) letter in the formula. (CH3COOH).

To answer your question.

HNO3 + KOH = KNO3 + H2O

In Words

Nitric Acid + Potassium Hydroxide) = potassium nitrate + water. 74

NB Do not confuse with the positions in a formula for hydrogen and oxygen.

HA = Mineral acid ( Sulphurioc Acid [ H2SO4)

MOH = Hydroxide ( Lithium hydroxide [ LiOH)

R-COOH = Carboxylic Acid. ( Ethanoic (Acetic) Acid [ CH3COOH)

These are the correct arrangements for the elemental symbols 'H'& 'O' as per the International IUPAC Standard.